Structure and Lithium-Ion Dynamics in Fluoride-Doped Cubic Li₇La₃Zr₂O₁₂ (LLZO) Garnet for Li Solid-State Battery Applications

Abstract

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X-ray pair distribution function analysis and electrical and electrochemical properties of cerium doped Li5La3Nb2O12 garnet solid-state electrolyte

“…[12][13][14] The highly conductive cubic phase can be stabilised through the creation of lithium vacancies, and the optimum conductivity is found for lithium contents of 6.4-6.6 per garnet formula unit. [15][16][17][18][19][20][21][22][23][24][25] In addition, to facilitate the practical application of ASSBs, issues such as high interfacial resistances between the electrode and electrolyte, and the lithium dendrite penetration problem within solid state electrolytes have attracted much attention in recent years. [26][27][28][29] The interfacial impedance between the garnet and electrode mainly arises from the poor contact in association with microscopic voids and grain boundaries of garnet, as well as an insulating Li 2 CO 3 surface layer formed in air initiated by the proton/lithium exchange at the surface.…”

Garnet Solid Electrolyte for Advanced All‐Solid‐State Li Batteries

“…Hence, the ion conductivity of c‐LLZO electrolyte is higher than that of t‐LLZO electrolyte. [ 35 ] The lithium ion channel ring surrounding the octahedron is shown in Figure 3b,d. For c‐LLZO, positions of Li1 and Li2 are arranged alternately.…”

Native Defects and Their Doping Response in the Lithium Solid Electrolyte Li7La3Zr2O12

“…29 These include other small cations, such as gallium, that directly substitute lithium; [30][31][32] larger cations, such as tantalum or niobium, that substitute zirconium or lanthanum on the M or M sites; 10 and donor anions, such as fluorine, that substitute oxygen. 33 Donor doping is usually assumed to affect lithium stoichiometry by causing the formation of charge-compenstating lithium vacancies, e.g. for a trivalent cation such as Al 3+ substituting for monovalent Li + , charge neutrality considerations suggest that 31,32 [Al…”